I haven't had a chance to read any of your material posted so far, but I've got a free couple of hours so I'll check a few out.
There was some beautiful imagery created, short snaps of description works, you've proved that.
I wasn't so sure on the prisoner being so verbose--I'm not suggesting he should be un-intelligent, but voice-overs, for me--I like them wholehearted, i hear a voice and i close-down, i listen to what's being said, challenging myself to see whether i can take in the imagery and surroundings. So when the guy is telling me so loquaciously what I'm trying to absorb, it feels as though he's walking around the meadow with a pointer and blackboard.
How it ended left me a little creatively hoarse, you lead me through beautiful scenery, took me on a journey in such a minute time-frame, to leave me and say your goodbyes at yet another beautiful location. I think with how it's been crafted, we're nowhere but with this guy who's writing this letter, there going to be the last words he ever speaks, so whether or not you show us the canyon or a derilict battle field now sprouting wild tulips, the audience is going to unknowingly remain in that cramped little jail cell as he utters his final farewell, hoping he murmurs some form of remorse for whatever the hell sins he committed.
This is how I'd have ended it, given how it's read.
I'd have lead this guy through the greenery, to a chair--the chair, his wrists secured with vines, shrubs, the chair itself glittered with exotic plants. While a bear pulls the lever.
You created an orb, successfully, that sampled death--that portrayed what would be torment and despair, into sublime surroundings, give me a taste of the bitter battling through the sweet. Reality standing its ground, piercing the dreams conjured up in the darkest moment.
I really liked this, I'll read a few more tonight.